Band knife sharpener



Aug. 25, 192,5. 1,551,167

E. M. oRLow BAND KNIFE SHARPENER Filed Nov. l5, 1924 3 Sheets-Sheet 3Patented Aug. 25, 1925. i

gimr'em offeree e ERNEST Mi foRLovv, OF'MILWAUKEE, Wisconsin,Asseironfor' onrtrriehr'r ARTHUR i y y".JJsomvrrrr;oF'MrLWAU'KEEWsooNsIN. n f

e band knife infthe cutting of Clothes .Where e` rsteokrof` cloth; islflpe'ssed over le ftable through which' i the rapidlyV moving,l 'bundpesses. Thesewettemptsfheve not been wholly satisfactory for thereason,thatngreatdifheulty was experienced` in lLsharpening the ffwvitlroutbinding, tearing ori YWedging.

This invention isdesi'gnedtofoverdoinelthe above noted defects, andobjects :offsuehV in* vention are @to provider wfbrnd. knife''sherpener'which` will `correctlyy sharpen thel oiitting Vedgeuof the vbundnknifeV'in ai manner `tol z purtifculzirly adept. iii for the f cutting of.cloth 4or similar muterialyvvhieh Fis '-so'v .mounted :that fito-maybe=left permanently fin place `if desired; Without interfering With thenorrnal "operation of the-bend knife, andy Which `is ofeoinpeot'design.w f

v-rFurtherobjeotsf"are: to providea` band knife shzn'r'pener in whichboth sidesrof the knife' muy be simultaneously ishe-rpelied in e`unifornr` ando even; mnner, Ain `v'vliieh Aprovision kis mede Aforadjusting thewfgrindng `Wheels in `reference toithe knifenenyde Esirecl'manner;` und "in which zu Very accurate sharpening muy bef readilylsecured.

An'er'nbodimentofV the invention isA shown `in the accompanyingdrawings, `in which:

Figure 1 is a front elevutionfofeeband knife machine showing fthe.:Sharpener in place.v

L Figure 2 is a` horizontel'seetionel vieWA on theline 242 of'Figure 1.

F-'gure Sis unelevation ofoneof` the eleotrio motors shovvingfinseetionf-themounting thereof.

`and State 'of `Wise`onsing lieve invented lcer- "tain new undusefulfImprovements in'FBand "such iltable,` 'fhoWever5 being *of fairly fFdesired I Figure4-fis eiflrear-view ofithefstructure shownjin Figure 3.

`Figure 5`is eview-ofthesupporting plete.V

for the motor mounting.

Figure 6 f is zurl enlarged"""digrarnrnetio fvievvl showing *therelative#"positionl `'offthe bendl knife and one :ofthe grinding"Wheels. 4'.llhrel mem machine 1sy Iprovidedi* Within` en endless bandVknife l Whiohfis adapted to travel! through a slotiinfaisupportingtable,E

'two` identical Afunits eohof Awhich lcomprises y Spend' 5) and thisEsu'ppc'irting"plate `is "prefing reenforeing flange 8 to enhancel itsrigidity. "Itfis'ulso equipped'witlr a'puir of-iun- `gulztrlyeirenged-jsl'ots 9 esgshowninwFig. ure 5;' for purpose liereinzfteri torappeur. This supporting plete carries a hinge'like structure consisting'of e bottom :plete or leef lO'fandi an upperI "leef 11E jinedw by meansof a piritlefpin '12 :idjeoentftheufory Ward: end infproximity to Athebundknife- 1, :as shown/in Figures l and fThe:bottoni `memb'erflO issecured yby:1ne:1ns'c)fbolts 13 to the'supportinglplate 7521s shownfinFiglure"-3,-suoli boltsy passing through theislztnt? Iing slots 9 -toprovide 'zndj ust'ment 'hereinafter described in greater detail.Thenremberflfl is provided Withenzeyelet portion lil-Which vreceiveswpiiitle pin l5, such pinpessing through* a centrally loo'ated eyelety'portion 16 of'anfndjusting screwl L17. y f" The` screw 17 :(see Figurethrough u" slot l8rV in the `memberv10? f and is --heldf invits4edjustediposition bymeens of nuts 19- loeutedeboveend below the plate10. The-'member 11A is `l-provided Withaup standing Vthreaded Alugs f2()`(see FigureA 3) 3') passes l0 Yun foutiverdlyf'extending supportinglarme Y l which lsfprovlded Withen apertured eollar un edge"A 'Whioh'effectively fsevers `Athe` y'eloth described, in detail, but inasmuch asthey through which an elongated threaded screw 21 passes, such screwbeing provided Vwith a rigidly attached collar 22 intermediate its endsand with a manipulating crank or hand bar 23 at'its outer end.

An electric motor 24 or other suitable type of motor is `adjustablycarried upon the plate 11. This motor is provided/with outwardlyHaringifeet or supports 25 which slide between guides 26 carried by theplate 11 (see F igure`4). The motor is further provided with downwardlyextending lugs 27 (see Figure 3) which are positioned on opposite sidesof thevcollar 22 and bymeans of which Lthe longitudinal adjustment ofthe motor maybe made.'` The motor. has its driving shaft 28 extendedoutwardly and such driving shaft carries' a grinding wheel 29 at itsouter., end.` One only ofthe grinding units has been ,are identical, Vasshownin Figures 1 and 2, such description will be sufficient. It is tobe noted, however, that they are mounted upon opposite sides vof theband knife 1 and n are mounted one above the other, as clearly shown inAFigure 1. Y I t In adjusting the device, the arms 4 are i rocked aboutthe standard 3 until the desired anglev required for thebevel on thefront edge of lthe knife 1 is secured. Thereafter, the angularirelationbetween'the plates 10 and 11 is secured by suitably adjusting the nuts19 (see Figures land 3) to thus adjust the anglebetween the face of thegrinding wheels and the blade or knife.

Thereafter the correct adjustment'axially of the motors is secured bymeans of the elongated screws V21. Preferably, however, the band knifeis run in the usual manner, the portion illustrated in` Figure 1 beingthe descendingV portion. Thereafter, the grinding wheels Iare movedjanto contact with the band knife andsharpening takes place. n L

It is to be noted particularly from Figure 6, that the band knife ispreferably set at avright angle to a vertical line. It is, therefore,apparent that when the arms 4 are elevated or lowered along the standard3 that a further adjustment is required to maintain the relativerelation between the grinding wheels andthe bevel faces 30 of the bandknife 1. Thisis secured by means of the slanting slots 9 which permit abodily shifting motion to be given to the support for the motors, thebolts 13 being loosened during this operation. Thereafter, the bolts aretightened and the motors, together with their grinding wheels have theircorrect relative position tothe knife 1.

It is tobe noted .particularly from reference to Figure 6 that theportion ofthe grinding wheels 29 which contact with the bevel faces 30of the knife are traveling up- ,limited only as claimed.

wardlyl and rearwardly. Also it is to be noted that the band knife 1 istraveling downwardly at this point. It is, therefore, apparent that a.multitude of angularly set microscopic teeth will be formed at the eX-treme outer edge of the bevel faces y30 of the knife. As shown in Figure6,v the path traced out on the bevel faces by any point on thegrindinguwheel will extendupwardly and ,rearwardly along a slantingline,`such as indicated roughly by the lines 31 in'Figure 6. However, itis to be distinctly understood that the teeth formed on the beveled edgeare microscopic teeth and the lines 31 are shown for illustrativeVpurposes only to more clearly bring Jout this feature. It has beenfound in actual practice that vthis -mode of sharpening the* knifeproduces vthese slanting microscopic teeth which will` saw through thefiber ofthe cloth in a highly effective manner, and which will permitthe use of the band-knifein cutting large stacks be'permanently leftinpositionl on the machine without interfering with the normaloperation. l

Although the invention has been described in considerable` detail, it isto be understood that the invention may riously embodied andxis,therefore, to be I claim: v 1. The combinationo-f a band knife, astandard locatedadjacent said knife, ay pair -of arms .adjustablycarried by saidl standard, a pair of motors adjustably carried by saidarms, fand grinding wheels operated by said motors and located uponopposite sides of said band knifey on the descending side thereof, ltheupwardly andrearwardly traveling portions of saidgrinding wheelscontacting with said knife, said grinding wheels being set one above theother.

2. The combination ofa band knife, a standard located adjacent. theldownwardly traveling portion of said knife, a pair of arms carried bysaid standards. and having rocking and vertical adjustment upon vsaidstandard, apairof electric motors pivotally related to said arms andadapted to rock about horizontal axes, means for adjusting the angularsetting of motors `relatively to said arms, means for moving said-motorstowards and from said band knife, said motors having driving shafts, anda pair of grinding wheels carried by said driving shafts and locatedupon opposite sides of the forward edge of said band knife.

3. The combination of a band knife, a

be va- Cil standard looated adjacent said knife, a pair of arms carriedby said standard, a pair of moto-rs adjustably carried by said arms, andgrinding wheels operated by Said motors and located upon opposite sides0f said band knife on the descending side thereof', the upwardly andrearwardly traveling portions of said grinding wheels contacting withsaid knife, said grinding wheels beingl set one above the other.

In testimony that I elairn the vforegoing I have hereunto set my hand atMilwaukee, in the county of Milwaukee and State of Visoonsin. 4

ERNEST M. oBLoW.

